transform_mode_gpopacity.cc

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/* SPDX-FileCopyrightText: 2001-2002 NaN Holding BV. All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <cstdlib>
 
#include "BLI_math_vector.h"
#include "BLI_string.h"
 
#include "BKE_unit.hh"
 
#include "ED_screen.hh"
 
#include "UI_interface.hh"
 
#include "BLT_translation.hh"
 
#include "transform.hh"
#include "transform_convert.hh"
#include "transform_snap.hh"
 
#include "transform_mode.hh"
 
namespace blender::ed::transform {
 
/* -------------------------------------------------------------------- */
static void applyGPOpacity(TransInfo *t)
{
  float ratio;
  int i;
  char str[UI_MAX_DRAW_STR];
 
  ratio = t->values[0] + t->values_modal_offset[0];
 
  transform_snap_increment(t, &ratio);
 
  applyNumInput(&t->num, &ratio);
 
  t->values_final[0] = ratio;
 
  /* Header print for NumInput. */
  if (hasNumInput(&t->num)) {
    char c[NUM_STR_REP_LEN];
 
    outputNumInput(&(t->num), c, t->scene->unit);
    SNPRINTF(str, IFACE_("Opacity: %s"), c);
  }
  else {
    SNPRINTF(str, IFACE_("Opacity: %3f"), ratio);
  }
 
  bool recalc = false;
  FOREACH_TRANS_DATA_CONTAINER (t, tc) {
    TransData *td = tc->data;
 
    recalc = true;
 
    for (i = 0; i < tc->data_len; i++, td++) {
      if (td->flag & TD_SKIP) {
        continue;
      }
 
      if (td->val) {
        *td->val = td->ival * ratio;
        /* Apply proportional editing. */
        *td->val = interpf(*td->val, td->ival, td->factor);
        CLAMP(*td->val, 0.0f, 1.0f);
      }
    }
  }
 
  if (recalc) {
    recalc_data(t);
  }
 
  ED_area_status_text(t->area, str);
}
 
static void initGPOpacity(TransInfo *t, wmOperator * /*op*/)
{
  t->mode = TFM_GPENCIL_OPACITY;
 
  initMouseInputMode(t, &t->mouse, INPUT_SPRING);
 
  t->idx_max = 0;
  t->num.idx_max = 0;
  t->snap[0] = 0.1f;
  t->snap[1] = t->snap[0] * 0.1f;
 
  copy_v3_fl(t->num.val_inc, t->snap[0]);
  t->num.unit_sys = t->scene->unit.system;
  t->num.unit_type[0] = B_UNIT_NONE;
 
#ifdef USE_NUM_NO_ZERO
  t->num.val_flag[0] |= NUM_NO_ZERO;
#endif
}
 
TransModeInfo TransMode_gpopacity = {
    /*flags*/ T_NO_CONSTRAINT,
    /*init_fn*/ initGPOpacity,
    /*transform_fn*/ applyGPOpacity,
    /*transform_matrix_fn*/ nullptr,
    /*handle_event_fn*/ nullptr,
    /*snap_distance_fn*/ nullptr,
    /*snap_apply_fn*/ nullptr,
    /*draw_fn*/ nullptr,
};
 
}  // namespace blender::ed::transform